Atlas Copco Compressor Sales offers Blast Hole Hydraulic Rock Drills. Atlas Copco Compressor Sales is an ISO 9001 and 14001 registered organization. The Blast Hole Hydraulic Rock Drills are suitable for drilling blast holes, grout holes and holes for installing rock bolts. The range of Blast Hole Hydraulic Rock Drills includes rock drills with an impact power of 11 up to 40 kW that are capable of drilling holes from 33 to 165 mm in diameter.